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The authors develop a fast and efficient algorithm that finds a survivable (i.e., robust to single fiber failures) mapping of IP topology on the mesh of fibers in IP-over-WDM networks; they call it SMART. A number of algorithms solving this problem can be found in the literature. Since ILP solutions are highly complex, many heuristics were proposed. They usually start with some initial mapping and then try to gradually improve it. This involves the evaluation of the entire topology at each iteration, which is costly for large topologies. They propose a different approach. The SMART algorithm breaks down the task into a set of independent and very simple subtasks. The combination of solutions of these subtasks is a survivable mapping.
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